Abstract
Polylysine-coated culture surfaces are strongly adhesive for neural cells, restrict locomotion on nonneuronal elements, but do not inhibit neurite elongation. In the present study, culture dishes were pre-treated with poly-d-lysine (PDL) at various concentrations, seeded with dissociates from 8-day chick embryo dorsal root ganglia, and incubated under conditions that normally support both neuronal survival and nonneuronal proliferation. Pretreatment with low (0.1 mg/ml) PDL concentrations had no effect on neuronal survival and neuritic growth, but entirely prevented an increase in ganglionic nonneurons, yielding a numerically stable culture greatly enriched in neurons. Higher PDL concentrations caused increasing losses in both cell classes. The 50% levels of cell loss were achieved at about the same PDL dose, but earlier for neurons than nonneurons and still with no impairment of neuritic growth from the surviving neurons. A procedure was developed to compare acid-soluble and acid-precipitable accumulation of radioactivity under 1-hr pulses of [3H]uridine, which was applicable even to poorly attached cells. The cytotoxic effects of higher PDL pretreatments was revealed as early as 6 hr after seeding by 2- to 4-fold lower radioaccumulation. The data are discussed in terms of possible regulations of cell permeability and metabolism by adhesive interactions between cells and their substratum, or other cells.
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Varon, S. The culture of chick embryo dorsal root ganglionic cells on polylysine-coated plastic. Neurochem Res 4, 155–173 (1979). https://doi.org/10.1007/BF00964141
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DOI: https://doi.org/10.1007/BF00964141